Variable Speed Compressors

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Danfoss has extended its inverter scroll compressor range VZH in 2014 to include three new models. The variable speed VZH compressors provide efficiency at part-load conditions, can improve efficiency by more than 30 percent and offer precise cooling capabilities. Designed for small rooftop and process cooling applications, the new inverter scroll compressor range will introduce cooling capacities between 4 and 6.5TR with a single compressor, and up to 13 tons with a manifold configuration. With a permanent magnet motor and patented Intermediate Discharge Valves (IDV), which can help improve part-load efficiency by up to 24 percent, the new variable speed compressor range will facilitate efficiency ratings up to 21 IEER and can modulate from 15 to 100 RPS.